Collection of utilities to use embedded-hal and embedded-storage traits with Embassy.

• Shared SPI and I2C buses, both blocking and async, with a SetConfig trait allowing changing bus configuration (e.g. frequency) between devices on the same bus.
• Async utilities
  • Adapters to convert from blocking to (fake) async.
  • Adapters to insert yields on trait operations.
• Flash utilities
  • Split a flash memory into smaller partitions.
  • Concatenate flash memories together.
  • Simulated in-memory flash.